Volkswagen CJDA Workshop Manual page 376

3
Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
q Checking return flow rate
q Removing and installing
9 - Fuel rail
10 - Fuel pressure sender -G247-
q Removing and installing
⇒ P age 394
q Checking
11 - Pressure retention valve
q The pressure retention valve maintains a residual pressure (for control purposes) of approx. 10 bar in
the return lines.
q This residual pressure is required for the control function of the piezo injectors.
q The pressure retention valve may only be renewed together with the fuel return lines.
q After replacement, engine must be run at idling speed for approx. 2 minutes to bleed fuel system.
q Check pressure retention valve
12 - Injectors (piezo injectors)
q Injector, cylinder 1 -N30-
q Injector, cylinder 2 -N31-
q Injector, cylinder 3 -N32-
q Injector, cylinder 4 -N33-
q Removing and installing
⇒ P age 398
q Checking
360 Repair Group 23 - Mixture preparation - injection
⇒ P age 377
⇒ P age
377.
⇒ P age
379.
⇒ P age
385.
⇒ P age
370.